OFFSET
1,1
COMMENTS
Column 4 of A208688
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -3*a(n-2) +10*a(n-3) -27*a(n-4) -6*a(n-5) -15*a(n-6) +51*a(n-7) +41*a(n-8) +31*a(n-9) -51*a(n-10) -29*a(n-11) -27*a(n-12) +15*a(n-13) +6*a(n-14) +3*a(n-15) -4*a(n-16) +a(n-17) +a(n-19)
EXAMPLE
Some solutions for n=4
..0..1..1..0....1..0..1..0....0..1..1..0....1..1..0..0....1..1..0..1
..0..1..1..0....1..1..1..0....1..1..0..1....0..1..0..1....1..1..0..1
..1..1..0..1....1..0..1..1....0..1..0..0....0..1..0..0....0..1..1..0
..0..1..0..0....1..0..1..0....0..1..0..0....1..0..1..0....0..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved